Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority

width = 800
height = 600
canvwidth = 1200
canvheight = 900
shape = arrow
mode = standard
resizemode = auto
fillcolor = ""
title = Python turtle graphics demo.